This is a note to let you know that I've just added the patch titled
io_uring: break iopolling on signal
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
io_uring-break-iopolling-on-signal.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From stable-owner@xxxxxxxxxxxxxxx Tue Sep 12 16:03:10 2023
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date: Tue, 12 Sep 2023 15:02:01 +0100
Subject: io_uring: break iopolling on signal
To: stable@xxxxxxxxxxxxxxx
Cc: Jens Axboe <axboe@xxxxxxxxx>, asml.silence@xxxxxxxxx
Message-ID: <b3b333ddf567f86104ce42708ad8982e561e9f59.1694522363.git.asml.silence@xxxxxxxxx>
From: Pavel Begunkov <asml.silence@xxxxxxxxx>
[ upstream commit dc314886cb3d0e4ab2858003e8de2917f8a3ccbd ]
Don't keep spinning iopoll with a signal set. It'll eventually return
back, e.g. by virtue of need_resched(), but it's not a nice user
experience.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: def596e9557c9 ("io_uring: support for IO polling")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Link: https://lore.kernel.org/r/eeba551e82cad12af30c3220125eb6cb244cc94c.1691594339.git.asml.silence@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/io_uring.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2668,6 +2668,11 @@ static int io_iopoll_check(struct io_rin
break;
}
ret = io_do_iopoll(ctx, &nr_events, min);
+
+ if (task_sigpending(current)) {
+ ret = -EINTR;
+ goto out;
+ }
} while (!ret && nr_events < min && !need_resched());
out:
mutex_unlock(&ctx->uring_lock);
Patches currently in stable-queue which might be from stable-owner@xxxxxxxxxxxxxxx are
queue-5.15/io_uring-always-lock-in-io_apoll_task_func.patch
queue-5.15/io_uring-break-out-of-iowq-iopoll-on-teardown.patch
queue-5.15/io_uring-break-iopolling-on-signal.patch
